水利学报
水利學報
수리학보
2012年
z2期
68-73
,共6页
漫顶溃坝%唐家山堰塞湖%推移质公式%边岸侵蚀模型
漫頂潰壩%唐傢山堰塞湖%推移質公式%邊岸侵蝕模型
만정궤패%당가산언새호%추이질공식%변안침식모형
overtopping%Tangjiashan barrier dam%bed-load formula%bank-erosion model
使用一维溃坝模型对唐家山堰塞湖溃决过程进行模拟,研究了推移质公式和边岸侵蚀模型对模拟结果的影响.溃决洪水流量过程线、溃口展宽过程和床面冲刷过程的对比表明,Meyer-Peter&Muller公式在描述漫顶溃坝初始阶段时存在计算冲刷偏小的现象,其可能原因是输沙率与Shields数的高阶(1.5次)非线性关系.本文的比较结果,有助于提高溃坝条件下推移质公式和边岸模型适用性的认识.
使用一維潰壩模型對唐傢山堰塞湖潰決過程進行模擬,研究瞭推移質公式和邊岸侵蝕模型對模擬結果的影響.潰決洪水流量過程線、潰口展寬過程和床麵遲刷過程的對比錶明,Meyer-Peter&Muller公式在描述漫頂潰壩初始階段時存在計算遲刷偏小的現象,其可能原因是輸沙率與Shields數的高階(1.5次)非線性關繫.本文的比較結果,有助于提高潰壩條件下推移質公式和邊岸模型適用性的認識.
사용일유궤패모형대당가산언새호궤결과정진행모의,연구료추이질공식화변안침식모형대모의결과적영향.궤결홍수류량과정선、궤구전관과정화상면충쇄과정적대비표명,Meyer-Peter&Muller공식재묘술만정궤패초시계단시존재계산충쇄편소적현상,기가능원인시수사솔여Shields수적고계(1.5차)비선성관계.본문적비교결과,유조우제고궤패조건하추이질공식화변안모형괄용성적인식.
The breaching process of Tangjiashan barrier dam was simulated to examine the applicability of simulation models. Two bed-load transport formulae and bank-erosion models were examined. The dam-break flow hydrograph, breach widening process, and bed erosion process were computed. It was found that the Meyer-Peter & Muller formula underestimates the erosion rate at the beginning of dam breaching. This is as?cribed to the nonlinear relationship between the bed load transport rate and the Shields number. This exami?nation contributes to improve our understanding of the capabilities of various bed-load transport formulations and bank erosion models in dam-break modeling. Examination against more field or experimental data will be desired.
